Casing for timing devices



J. LORBER AND H. L. HILL.

CASING FOR TIMING DEVICES.

APPLICATION FILED FEB. 11. 1919.

D Z H Patented Feb. 17, 1920.

INVENTORS. W M Y $10.66.,

AT RNEY.

UNITED STATES PATENT OFF EOE.

JACOB LORBER, OF NEW YORK, N. Y., AND HOWARD L. HILL, OF ELIZABETH, NEW JERSEY, ASSIGNOBS TO J. LORIBER & 00., INC., OF N EWARK, NEW JERSEY.

CASING FOR TIMING DEVICES.

Specification of Letters Patent.

Patented Feb. 17, 1e 2o.

Application filed February 11, 1919. Serial No. 276,278.

To all whom it may concern:

Be it known that we, JACOB LORBER and HOWARD L. HILL, citizens of the United States, and residents of New York, State of New York, and Elizabeth, county of Union, and State of New Jersey, respectively, have invented certain new and useful Improvements in Casings for Timing Devices, of which the following is a specification.

This invention relates to an improved casing for timing devices, sometimes called commutators, used in automobiles to regulate the proper sequence and intervals of sparks, being placed in the electrical 01rcuit and being substantially a make-andbreak device.

The present device is adapted for use particularly on Ford cars, and is adapted to be placed within the casing and has a structure adapted to fit in the Ford cars without any further supporting or positioning devices than are now in use.

The device is made of insulating material and is made up of two members which are easily assembled and which are provided with registering devices that insure the parts being assembled in their proper relative positions, there being but two pieces to the completed device, and in case of breakage but one needs to be replaced. The construction further insures long, cont nuous operation, necessitating but few repairs, as the contacts are arranged on an interior projecting rim which provides spaces on each side thereof for the accumulation of whatever dirt or grease gets into the devlce, whereby the face of this projecting rim and its contacts are kept clean and dry and short circuiting in the device is reduced to a minimum.

The invention is illustrated in the accompanying drawing, in which Figure 1 is a face view of the device, and Fig. 2 is a central vertical section of Fig. 1. Fig. 3 is a face view of the ring-shaped member partly broken away at one point, and Fig. 4 is an end view of one of the electrical contacts.

The device consists of two members, a ring-shaped member 10 and a cup-shaped member 11, the ring-shaped member having a projecting rim 12 on its inner face, and electrical contacts 13 are provided, these having curved inner faces concentric with the inner face of the rim 12, each contact having a screw-threaded post 14, these posts projecting through and beyond the body of the member and forming binding posts for the wires which are adapted to be attached to the device, the circuit passing through these wires; which are not shown, and the contacts transmit successively to a suitable moving contact, which is indicated in a conventional way by the ring 15.

The member is preferably made of plastic material that is an insulation for electricity, and the contacts 13 and the posts 14 are to a great extent embedded in the material, and when it is molded and after it is hardened they are rigidly and positively held in place. They provide a smooth finish, are economical to make and require no assembling.

On the face of the ring-shaped member 10, and adjacent to the rim 12, is a projecting flange 16, which is so placed that there is a face 17 between the outer edge of the flange and the outer edge of the member. The cupshaped member 11 has a substantially narrow periphery or outer rim 18, which rests against the face 17 and forms a closure for the ring-shaped member on one side, which, for the purpose of identification, we will call the front of the ring-shaped member.

The center of the member 11 is thickened, this being preferably done by having the inside face of the cup-shaped member substantially flattened, as at 19, and the outer face made pointed, as at 20, so that a thickened center portion is provided well calcu lated to stand any strains and is preferably provided with a central indentation 21, which provides a space for the reception of a holding arm, not shown, and which in Ford cars is utilized for holding the front of the timing device in place. I

To insure proper seating and to avoid any 'error in its seating, the cap member 11 is provided with recesses 22, these being adapt ed to fit over lugs 23 on the ring-shaped member, and to insure the proper placing of the cap, the members and their recessed lugs are made of different sizes so that the capshaped member will not go on unless it is in its proper position.

The cap-shaped member has an arm 24 which is used for the attachment of a rod for manually an pulat ng it, so that the whole device can be swung to advance or retard the spark, the attachment of the rod being usually provided for by an opening 25. Suitable oiling can be done through the opening 26.

It will be evident from this description that the commutator or timing device casing can be produced economically, reducing both the cost of m nufacture and replacement due to breakage. The device is easily produced and easily molded, and the secondary parts, such as the contacts, are put in posi tion during the process of molding, thereba entailing no further work after the comnuitator is out of the mold. The casing forms a structure well trussed against the strains to which is subjected, and it is not apt to be broken under ordinary usage.

Furthermore, the space 27 behind the rim 12 and the space in front of the rim form chambers or recesses into which dirt and any oil that might leak into the commutator assemble, thus minimizing the chance of having a short circuit in the device, since no accumulation of oil or dirt on the roller bearing surface, that is, the interior face of the rim, takes place.

We claim:

A casing for a timing device comprising a ring-shaped member of plastic material with a rib on its inner face anda projecting flange on its front face, contacts with their inner faces flush with the inner face of the rib and having screw-threaded posts extending beyond the outer face of the member, the contacts, except their inner faces and part of the posts, being embedded in the material of which the member is made, and a cupshaped member with a thickened center and a narrow edge resting on the front face of the ring-shaped member and of larger diameter than the flange, and lugs of unequal size on the front of the ring-shaped member, the cup-shaped member having recesses of unequal size to fit the lugs.

In testimony that we claim the foregoing, we have hereto set our hands, this 7th day of February, 1919.

' JACOB LORBER.

HOWARD L. HILL. 

